含悬垂双键超支化聚合物的一步法合成  

One-Pot Synthesis of Hyperbranched Polymers with Pendant Vinyl Bonds

作　　者：杨宏军[1,2] 柏涛[1,2] 薛小强[1,2] 黄文艳[1,2] 蒋必彪[1,2] 

机构地区：[1]江苏省材料表面科学与技术重点实验室,江苏常州213164 [2]常州大学材料科学与工程学院,江苏常州213164

出　　处：《常州大学学报（自然科学版）》2016年第2期14-19,共6页Journal of Changzhou University：Natural Science Edition

基　　金：国家自然科学青年基金项目(21304010);江苏省自然科学青年基金项目(SBK201342994);常州大学科技创新基金项目(ZMF13020026)

摘　　要：以膦腈碱(t-BuP4)为催化剂,甲基丙烯酸羟乙酯(HEMA)为自引发单体,甲基丙烯酸烯丙酯(AMA)为共聚单体,通过自缩合阴离子聚合反应,在室温下一步法合成含悬垂双键的超支化聚合物。用核磁(H NMR)、三检测体积排阻色谱仪(TD-SEC)、示差扫描量热仪(DSC)和热失重分析仪(TGA)对聚合物结构和性能进行测试和表征。结果表明,t-BuP4能在常温下催化HEMA和AMA的自缩合阴离子共聚合,制备含悬垂双键的超支化聚合物。反应过程中AMA单体转化率高达95%,体系无交联。合成支化聚合物的玻璃化转变温度约为30.4℃,其特性黏度小于同分子质量的线型聚合物,其Zimm支化因子g’的值小于1。Hyperbranched polymers with pendant vinyl groups were synthesized in one step by the self-condensing anionic copolymerization of allyl methacrylate（AMA）and 2-hydroethyl methacrylate（HEMA）using t-BuP4 as catalyst.The structure and performance of the resulted copolymers have been characterized by nuclear magnetic resonance spectroscopy（NMR）,triple detection size exclusion chromatography（TDSEC）,differential scanning calorimetry（DSC）and themogravimetric analysis（TGA）.The results show that t-BuP4 is effective for the copolymerization of AMA and HEMA with a very high monomer conversion.The resulted hyperbranched copolymer exhibited a lower viscosity than their linear analogues with the similar molecular weight.Its glass transition temperature was about 30.4℃,lower than that of linear polymer.The branching factor g＇was less than 1for the whole fractions of the branching polymer.

关 键 词：超支化聚合物 自缩合阴离子聚合 甲基丙烯酸烯丙酯 悬垂双键 

分 类 号：TQ316.334[化学工程—高聚物工业]